摘要：The purpose of the study was to compare the dental caries frequencies in children with enamel deficiency , in primary and permanent teeth , in order to show their importance as a health problem. In the studied group the percent of dysplasia of the damaged primary teeth reached a maximum value of 9.1% in ten-year-old girls and 31.4% in boys of the same age . Due to the physiological exfoliation of deciduous teeth , the proportion decreased to 0 near the age of 11 y. At the permanent teeth , a change of the pattern diseases appeared because the age of 8-11 is the period of mixed dentition . The eruption of permanent teeth being in progress , the cavities at these teeth are less and the weight of dental dysplasia is higher within the total number of damaged teeth
关键词： primary and permanent dentition , caries , defects of enamel development
